melissa: union anger explodes in michigan. the state passes right-to-work laws, dealing a huge punch to union power. but they are not going down without a fight. the economic fault lines could spread across the country. also, "money" tonight, a crash for gas prices. they are tumbling across the u.s. it's an early christmas gift for drivers but we'll tell you if the relief will last through the new year. >>> pepsi is crazy in love with beyonce. the music icon inks a $50 million deal to pitch its products. can she really make you stop drinking coke though? i say pepsi just got hosed. but a top marketing expert is here to disagree with me. even when they say it's not it is always about money melissa: firss, let's look at the day's market headlines of the leave it to congress to suck the air out of a good thing. stocks soared in early trading on hopes of a deal on the fiscal cliff. but a parade of speeches by congressional leaders this afternoon dump ad whole lot of water on the rally. stocks pared back from session highs. dow clo